She had never, in her 73 years left her home country of Scotland. Now Glasgow Gran Grace Sergeant is one of our greatest adventurers.

In the past few months Grace has taken a plunge in a shark pool, walked the parapet of Toronto's CN Tower, spent a night in the Amazonian jungle and hit top speeds of 80mph on Dubai's biggest water slide.

The Pollokshields Gran even stood shoulder to shoulder with armed police in Peru as they have carried out a drugs bust.

It sounds like a bucket list too incredible to believe. In fact, it's all part of an elaborate plan to try and bump her off!

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Grace is one of the stars of the new TV show, 50 Ways to Kill Your Mammies, which screens on Sky One tonight and - as the title suggests - sets a team of Supergrans a series of once in a lifetime challenges.

For Grace, who was widowed six years ago, it was a chance she simply could not pass up.

Grace Sergeant goes on her 'edgewalk' at the CN Tower (Image: Sky)

"At first I was quite sceptical," said Grace, who first saw the advert for contestants at her local community centre. "I went home, emailed the production team and didn't think it would come to anything."

A few days later the phone rang, inviting Grace down to London where she met presenter Baz Ashmawy and his mammy, Nancy, who also appears in the show.

They hit it off straight away and soon Grace was off on a journey around the world, taking part in a run of stunts and challenges that would scare of even the boldest adventurer.

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In the show, she attempts every one of them - including tackling alligators, living with a desert tribe in Ethiopia, joining the Irish army on manoeuvres in Africa and meeting some of America's most violent criminals in Oklahoma.

She was even handed a plastic riot shield and spent the night in an armoured car as part of the drugs bust in Peru.

Grace Sergeant on her drugs bust in Peru (Image: Sky)

She admitted that scaling the CN Tower was 'terrifying', while plunging into a tank full of marine life forced her to confront her greatest fear.

Grace, who can't swim, said: "It was so deep it took 40 minutes to reach the bottom. I could see a group of children waving at me, it was great fun. I wasn't worried about the sharks, I just held my nerve until I was back on dry land."